Merge pull request #4113 from eXist-db/dependabot/maven/log4j.version-2.15.0

Bump log4j.version from 2.14.1 to 2.15.0

Author: dizzzz

exist-parent/pom.xml

@@ -111,7 +111,7 @@
         <jaxb.api.version>3.0.1</jaxb.api.version>
         <jaxb.impl.version>3.0.2</jaxb.impl.version>
         <jetty.version>9.4.44.v20210927</jetty.version>
-        <log4j.version>2.14.1</log4j.version>
+        <log4j.version>2.15.0</log4j.version>
         <lucene.version>4.10.4</lucene.version>
         <milton.version>1.8.1.3</milton.version>
         <saxon.version>9.9.1-8</saxon.version>